heat a copper wire and its electric resistance Question: When they carry lots of current, high voltage wires, hot, to electrical resistance in, w 8 Best Heat A Copper Wire, Its Electric Resistance Photos

8 Best Heat A Copper Wire, Its Electric Resistance Photos

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8 Best Heat A Copper Wire, Its Electric Resistance Photos - 2 14. A copper cord is a part of a whole circuit thru which contemporary flows. Which graph great represents the relationship between the twine's duration and its resistance? 15. A manufacturer recommends that the longer the extension cord used with an electric drill, the thicker (heavier gauge) the extension wire have to be. This recommendation is made because the resistance of a cord varies directly with length and inversely with cross-sectional area inversely with length and at once with pass-sectional place directly with both length and cross-sectional area inversely with each duration and cross-sectional area 16. A copper wire of period l and move-sectional region a has resistance r. A second copper cord at the identical temperature has a duration of 2l and a pass-sectional region of 1 2a. What is the resistance of the second one copper wire? R 2r 1 r 2 4r 17. To lessen the resistance of a steel conductor one need to cool the conductor to a low temperature heat the conductor to a high temperature coat the conductor with an insulator wire the conductor in collection with some other resistor 18. Because the temperature of a coil of copper cord increases, its electrical resistance decreases stays the identical increases 19. While an incandescent mild bulb is became on, its skinny twine filament heats up quick. Because the temperature of this cord filament increases, its electrical resistance decreases remains the identical will increase 20. The resistance of a copper cord is measured to be four ohms at 20ºc. If the wire is heated to 30ºc, the resistance of the twine will be zero ohms extra than 4 ohms less than 4 ohms 4 ohms.

4 26. Which graph beneath first-rate represents how the resistance (r) of a sequence of copper wires of uniform period and temperature varies with pass-sectional location (a)? 29. If each the pass-sectional region and the duration of a metallic conductor had been doubled, the resistance of the conductor would be halved unchanged doubled quadrupled 30. The graph beneath represents the relationship between potential difference and contemporary for four exclusive resistors. Which resistor has the greatest resistance? 27. The diagram beneath indicates a circuit wherein a copper wire connects factors a and b. A c b d the electrical resistance between factors a and b may be decreased by changing the twine with a thicker copper twine of the identical duration replacing the cord with an extended copper wire of the same thickness increasing the temperature of the copper twine growing the capability difference furnished by means of the battery 31. A student wishes to boom the resistance in a circuit. All this is to be had for this project is a extensive style of wires of various lengths and thicknesses. To acquire the most resistance, the student ought to update the wire with one that is shortest and thickest longest and thickest shortest and thinnest longest and thinnest 32. A 10.-Meter duration of wire with a go-sectional vicinity of rectangular meter has a resistance of ohm at 20 celsius. The cord is most possibly product of silver aluminum copper tungsten 28. Which section of copper cord has the highest resistance at room temperature? 1.Zero m duration, m 2 move-sectional vicinity 2.0 m duration, m 2 go-sectional area 1.0 m length, m 2 move-sectional vicinity 2.0 m period, m 2 pass-sectional place.